linux/net/netfilter/nf_conntrack_snmp.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *      SNMP service broadcast connection tracking helper
 *
 *      (c) 2011 Jiri Olsa <[email protected]>
 */
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/in.h>

#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <linux/netfilter/nf_conntrack_snmp.h>

#define SNMP_PORT …

MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;
MODULE_LICENSE(…) …;
MODULE_ALIAS_NFCT_HELPER(…) …;

static unsigned int timeout __read_mostly = …;
module_param(timeout, uint, 0400);
MODULE_PARM_DESC(…) …;

int (*nf_nat_snmp_hook)(struct sk_buff *skb,
			unsigned int protoff,
			struct nf_conn *ct,
			enum ip_conntrack_info ctinfo);
EXPORT_SYMBOL_GPL(…);

static int snmp_conntrack_help(struct sk_buff *skb, unsigned int protoff,
			       struct nf_conn *ct,
			       enum ip_conntrack_info ctinfo)
{ … }

static struct nf_conntrack_expect_policy exp_policy = …;

static struct nf_conntrack_helper helper __read_mostly = …;

static int __init nf_conntrack_snmp_init(void)
{ … }

static void __exit nf_conntrack_snmp_fini(void)
{ … }

module_init(…) …;
module_exit(nf_conntrack_snmp_fini);